Check your IAT Sensor Orientation
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Senior Member
Joined: Nov 1999
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From: South Carolina, USA
Check your IAT Sensor Orientation
This "idea" was originally posted by "SportnSilver03" on FordTruckWorld.com ( Original Thread ).
Basically, check the IAT (Intake Air Temp) sensor on the intake tube just on the engine side of the air box. I am getting about an average of 17 mpg (87 octane, no chip, stock air filter, only replaced the stock snorkle with a 3" PVC coupler) and after checking it I found it was only slightly off the vertical. Those of you that have it installed horizontally may be getting lower MPG since the air does not flow smoothly over the sensor wire that is between the casing.
It's easy to check and probably worth it since you may get some free fuel mileage out of it. And with the fuel prices the way they are now, we can all use that.
Basically, check the IAT (Intake Air Temp) sensor on the intake tube just on the engine side of the air box. I am getting about an average of 17 mpg (87 octane, no chip, stock air filter, only replaced the stock snorkle with a 3" PVC coupler) and after checking it I found it was only slightly off the vertical. Those of you that have it installed horizontally may be getting lower MPG since the air does not flow smoothly over the sensor wire that is between the casing.
It's easy to check and probably worth it since you may get some free fuel mileage out of it. And with the fuel prices the way they are now, we can all use that.
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Joined: Jun 2003
Posts: 23
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From: Oklahoma City
So you should mount it exactly vertical? Mine is horizontal with the element itself closer to the truck's nose. If it should be vertical should the element be at the top or bottom of the tube? What kind of MPG were u getting before you did this?
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Joined: Jul 1999
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From: KC, MO
This applies to factory intakes as well!!! I just went out to check mine, and was surprised to find that it still rotates. Mine was facing pass. side, so I flipped it to the driver's side, though I don't think it matters as long as it's one way or the other.
-AR
-AR
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Senior Member
Joined: Nov 1999
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From: South Carolina, USA
It doesn't matter if it faces the drivers side or the passenger side. What does matter is this:
The sensor element (the little wire with a black tip) itself is surrounded by a plastic U. If this U is parallel to the ground/sky (i.e. it is horizontal) then the flow of air over the sensor element is restricted. On the other hand, if the U is vertical (i.e. parallel with the sides of the truck) then air can pass over it freely and the sensor is much more effective.
Today I posted my best value for fuel mileage - 17.257 mpg. Some of that tank was city and some was interstate (>75 mph, mostly 77-78 mph). The previous ten tanks of fuel averaged 16.507 mpg.
The sensor element (the little wire with a black tip) itself is surrounded by a plastic U. If this U is parallel to the ground/sky (i.e. it is horizontal) then the flow of air over the sensor element is restricted. On the other hand, if the U is vertical (i.e. parallel with the sides of the truck) then air can pass over it freely and the sensor is much more effective.
Today I posted my best value for fuel mileage - 17.257 mpg. Some of that tank was city and some was interstate (>75 mph, mostly 77-78 mph). The previous ten tanks of fuel averaged 16.507 mpg.